STUDY ON REDUCTION MECHANISM OF WAVE PRESSURE AT LANDWARD SIDE OF CAISSON DUE TO TSUNAMI OVERFLOW

• NAKAMURA Tomoaki

  名古屋大学 高等研究院

• ANDO Kohei

  西日本旅客鉄道株式会社

• MIZUTANI Norimi

  名古屋大学 大学院工学研究科社会基盤工学専攻

• KOTAKE Yasuo

  東洋建設株式会社 総合技術研究所鳴尾研究所

Bibliographic Information

Other Title

• 津波の越流による混成堤ケーソン岸側での水圧の低下機構に関する研究

Abstract

 The mechanism of a decrease in wave pressure at the landward side of a caisson on a rubble mound during tsunami overflow is investigated using a coupled fluid-structure interaction model. Numerical results show that the wave pressure acting on the landward surface of the caisson after the onset of the overflow is overestimated by the hydrostatic pressure calculated from an elevation in the water surface. This discrepancy is caused by vortices formed by the separation of the flow. Furthermore, a temporal decrease in the wave pressure results from an increase in the flow velocity. Based on the numerical results, an approximation equation is proposed to predict the reduction rate of the wave force acting on the landward surface of the caisson from water surface elevations at the seaward and landward sides of the caisson.

Journal

• Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering)

  Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering) 69 (2), I_389-I_394, 2013

  Japan Society of Civil Engineers

Keywords

• tsunami
• caisson
• wave pressure
• wave force
• vortex
• numerical analysis

Details

• CRID: 1390001205352546688
• NII Article ID: 130004961748
• DOI: 10.2208/jscejoe.69.i_389
• ISSN: 21854688
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed